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CAKE
- 1 cup (2 sticks) butter
- 1 cup water
- 2 1/4 cups all purpose flour
- 2 cups granulated sugar
- 1/2 teaspoon kosher salt
- 1 teaspoon baking soda
- 1 tablespoon vanilla extract
- 1/2 cup sour cream
- 2 large eggs
FROSTING
- 1 cup (2 sticks) butter
- 4 1/2 cups powdered sugar
- 1/4 teaspoon salt
- 1/2 cup sour cream
- 1 tablespoon vanilla
CAKE
- Preheat oven to 350 degrees and thoroughly grease a large baking sheet (we used a 12×18).
- Add the butter and water to a medium sauce pan and bring to a boil. Stir to combine then remove from heat.
- In a large bowl, combine flour, sugar, salt, and baking soda and whisk together.
- Pour the butter mixture into the dry ingredients and mix until smooth.
- Add vanilla, sour cream, and the eggs to the batter and mix while scraping the sides of the bowl.
- Pour batter into prepared baking sheet to form one level layer.
- Bake for 17-20 minutes or until a inserted toothpick comes out clean of batter.
FROSTING
- Once the cake is finished baking, start on the frosting.
- In a microwave safe bowl, melt butter.
- Add 2 cups of the powdered sugar, sour cream, salt, and vanilla. Mix until there are no lumps.
- Add remaining powdered sugar and mix until incorporated.
- After cake has cooled for 20 minutes, pour frosting over cake and spread into an even layer.
- Allow cake to cool for at least 1 hour (until frosting sets) before cutting.